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      <title>如何设置远程调用的超时时间？ - 交互式测验</title>
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          border-radius: 8px;
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        .option-item:hover {
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        .quiz-footer {
          padding: 20px 30px;
          display: flex;
          justify-content: space-between; /* 将按钮分布在两侧 */
          align-items: center;
          min-height: 65px; /* Reserve space */
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        .nav-btn {
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          color: white;
          border: none;
          border-radius: 8px;
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          font-size: 16px;
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          cursor: pointer;
          transition: background-color 0.2s ease, transform 0.2s ease;
          box-shadow: 0 4px 12px rgba(0,0,0,0.15);
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        .nav-btn:hover {
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      </style>
    </head>
    <body>
      <div class="main-wrapper">
          <div class="quiz-container">
            <div class="quiz-header">
              <h1>如何设置远程调用的超时时间？ - 交互式测验</h1>
              <p>检验你对文档内容的理解程度</p>
            </div>
            <div id="quiz-content">
                <div class="quiz-body">
                    <div class="progress-bar">
                        <div id="progress-indicator"></div>
                    </div>
                    <div id="question-container">
                      <p id="question-text"></p>
                      <ul class="options-list" id="options-list"></ul>
                    </div>
                    <div id="result-container"></div>
                    <div id="hint-container" class="hint-container"></div>
                </div>
                <div class="quiz-footer" id="quiz-footer">
                  <button id="prev-btn" class="nav-btn">上一题</button>
                  <button id="hint-btn" class="nav-btn" style="background-color: #ffc107; color: #333; box-shadow: 0 4px 12px rgba(255,193,7,0.3);">提示</button>
                  <button id="next-btn" class="nav-btn">下一题</button>
                </div>
            </div>
          </div>
      </div>

      <script>
        const quizData = [
  {
    "question": "根据文档，在使用 Apache HttpClient 时，`setConnectTimeout` 和 `setSocketTimeout` 分别用于控制什么？",
    "options": [
      "前者控制写入超时，后者控制读取超时。",
      "前者控制建立连接的超时，后者控制数据传输（读取）的超时。",
      "两者都用于控制整个请求的生命周期总时长。",
      "前者控制DNS解析超时，后者控制连接建立超时。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "`setConnectTimeout` 用于设置客户端与服务器建立TCP连接的最长时间。而 `setSocketTimeout` (也常被称为读取超时) 是在连接建立后，等待服务器返回数据的最长时间。这两个是HTTP客户端中最基本也是最重要的超时设置。",
    "source": "文档中「1. 在 HTTP 客户端中设置超时」部分",
    "hint": "回顾文档中 Apache HttpClient 的代码示例，注意注释中对两个超时设置的解释。"
  },
  {
    "question": "在 Spring Cloud 中，为 Feign 客户端配置全局默认的连接和读取超时，应该在 `application.yaml` 文件的哪个路径下进行设置？",
    "options": [
      "spring.feign.timeout.connect 和 spring.feign.timeout.read",
      "feign.httpclient.connect-timeout 和 feign.httpclient.read-timeout",
      "feign.client.config.default.connectTimeout 和 feign.client.config.default.readTimeout",
      "server.feign.client.default.connectTimeout 和 server.feign.client.default.readTimeout"
    ],
    "correctAnswerIndex": 2,
    "explanation": "文档明确指出，为 Feign 设置超时需要在 `feign.client.config` 路径下进行。`default` 关键字用于设置一个全局的默认配置，适用于所有 Feign 客户端。具体的超时属性是 `connectTimeout` 和 `readTimeout`。",
    "source": "文档中「3. 在 Spring Cloud 中设置超时」部分",
    "hint": "查看文档中关于 Feign 的 YAML 配置示例，注意其层级结构和属性名称。"
  },
  {
    "question": "文档中展示的 OkHttp 超时设置相较于 Apache HttpClient 的示例，额外明确配置了哪种类型的超时？",
    "options": [
      "写入超时 (writeTimeout)",
      "响应超时 (responseTimeout)",
      "连接池获取超时 (connectionPoolTimeout)",
      "总请求超时 (callTimeout)"
    ],
    "correctAnswerIndex": 0,
    "explanation": "在文档提供的代码示例中，OkHttp 的配置链式调用了 `.connectTimeout()`, `.readTimeout()` 和 `.writeTimeout()`。而 Apache HttpClient 的示例中只展示了 `setConnectTimeout` 和 `setSocketTimeout`（读取超时），并未直接展示写入超时。",
    "source": "文档中「1. 在 HTTP 客户端中设置超时」部分",
    "hint": "请仔细对比文档中 Apache HttpClient 和 OkHttp 的代码示例，找出 OkHttp 示例中多出的一个超时设置方法。"
  },
  {
    "question": "根据文档，如果你在使用 Dubbo 框架，并且希望为一个远程服务调用设置5秒的超时，最直接的配置方式是什么？",
    "options": [
      "在 application.yaml 中设置 `dubbo.reference.timeout: 5000`。",
      "在 XML 配置文件中，于 `<dubbo:reference>` 标签上添加 `timeout=\"5000\"` 属性。",
      "通过 Java 代码调用 `SomeService.setDubboTimeout(5000)`。",
      "在 Dubbo Provider 端，于 `<dubbo:service>` 标签上设置 `timeout` 属性。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "文档中关于 Dubbo 的示例清晰地展示了在消费方（客户端）的 `<dubbo:reference>` 标签中使用 `timeout` 属性来为特定的服务引用配置超时时间。这是 Dubbo 经典的 XML 配置方式。",
    "source": "文档中「2. 在 RPC 框架中设置超时」部分",
    "hint": "回想一下 Dubbo 经典的配置方式，文档中提供了一个 XML 配置的例子。"
  },
  {
    "question": "文档在“根据实际场景合理配置”部分提出了几点建议，以下哪一项不属于文档中提到的最佳实践？",
    "options": [
      "结合全局配置与特定调用的局部配置。",
      "为了系统的绝对稳定，应将所有超时时间设置为尽可能短的值。",
      "通过分析调用链的响应时间数据来确定合理的超时值。",
      "在服务调用、数据库访问、缓存访问等多个层级上设置超时。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "文档强调的是“合理设置超时时间，避免超时设置过短或过长”。设置过短的超时会导致在正常网络波动或服务负载较高时出现大量不必要的超时失败，影响系统可用性。因此，“设置为尽可能短的值”是一种错误的实践。",
    "source": "文档中「5. 根据实际场景合理配置」部分",
    "hint": "最佳实践通常强调“合理”和“平衡”，而不是极端。思考哪个选项听起来过于绝对化。"
  },
  {
    "question": "在 Spring Cloud Gateway 中，`spring.cloud.gateway.httpclient.response-timeout` 配置项控制的是什么时间？",
    "options": [
      "仅指建立连接到目标服务的最大时间。",
      "从网关接收到请求到将响应完全写回客户端的最大时间。",
      "从请求被发送到下游服务开始，直到从下游服务接收到完整响应的最大时间。",
      "仅指等待下游服务返回第一个数据包的最大时间。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "在网关场景下，`response-timeout` 通常指网关作为客户端去调用后端服务时的响应超时。它覆盖了从请求发送到后端服务，直到网关接收到来自该服务的完整响应为止的整个过程。这与 `connect-timeout`（仅连接阶段）是不同的。",
    "source": "文档中「3. 在 Spring Cloud 中设置超时」部分",
    "hint": "这个配置项位于 `httpclient` 目录下，暗示了它是网关作为“客户端”角色时的行为。`response` 这个词是关键。"
  },
  {
    "question": "如果你正在使用 Netty 编写一个网络客户端，并希望设置连接超时，应该使用哪个 `ChannelOption`？",
    "options": [
      "ChannelOption.SO_TIMEOUT",
      "ChannelOption.READ_TIMEOUT_MILLIS",
      "ChannelOption.CONNECT_TIMEOUT_MILLIS",
      "ChannelOption.WRITE_BUFFER_WATER_MARK"
    ],
    "correctAnswerIndex": 2,
    "explanation": "文档中的 Netty 示例明确指出，`bootstrap.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 5000)` 用于设置连接超时。这个选项控制了客户端尝试与服务器建立连接的最长等待时间。",
    "source": "文档中「4. 在 Netty 中设置超时」部分",
    "hint": "在 Netty 的选项中，名称通常是自解释的。寻找与“连接超时”字面意思最接近的选项。"
  }
];
        console.log("Quiz Data:", JSON.parse(JSON.stringify(quizData))); // 添加这行用于调试，以可展开的JSON格式输出
        
        let currentQuestionIndex = 0;
        let score = 0;
        // 存储每个问题的回答状态
        const userAnswers = new Array(quizData.length).fill(null); 

        const questionTextEl = document.getElementById('question-text');
        const optionsListEl = document.getElementById('options-list');
        const resultContainerEl = document.getElementById('result-container');
        const quizContentEl = document.getElementById('quiz-content');
        const progressIndicatorEl = document.getElementById('progress-indicator');
        const prevBtn = document.getElementById('prev-btn');
        const nextBtn = document.getElementById('next-btn');
        const hintBtn = document.getElementById('hint-btn');
        const hintContainerEl = document.getElementById('hint-container');

        function loadQuestion() {
          resultContainerEl.innerHTML = '';
          optionsListEl.innerHTML = '';
          hintContainerEl.style.display = 'none'; // 隐藏提示
          
          if (currentQuestionIndex >= quizData.length) {
            showFinalScore();
            return;
          }

          updateProgress();

          const currentQuestion = quizData[currentQuestionIndex];
          questionTextEl.textContent = `(${currentQuestionIndex + 1}/${quizData.length}) ${currentQuestion.question}`;
          
          currentQuestion.options.forEach((optionText, index) => {
            const li = document.createElement('li');
            li.className = 'option-item';
            li.textContent = optionText;
            li.dataset.index = index; // Store index in a data attribute
            // 如果这道题已经回答过，恢复状态
            if (userAnswers[currentQuestionIndex] !== null) {
                if (index === userAnswers[currentQuestionIndex]) {
                    li.classList.add('selected');
                }
            }
            optionsListEl.appendChild(li);
          });

          // 如果已经回答过，直接显示结果
          if (userAnswers[currentQuestionIndex] !== null) {
              const isCorrect = userAnswers[currentQuestionIndex] === currentQuestion.correctAnswerIndex;
              showResult(isCorrect, currentQuestion);
          }
          
          updateNavigationButtons();
          updateProgress();
        }

        function selectOption(optionIndex) {
            userAnswers[currentQuestionIndex] = optionIndex;
            const currentQuestion = quizData[currentQuestionIndex];
            const isCorrect = optionIndex === currentQuestion.correctAnswerIndex;

            // 重新计算分数
            score = userAnswers.reduce((acc, answer, index) => {
                return answer === quizData[index].correctAnswerIndex ? acc + 1 : acc;
            }, 0);

            showResult(isCorrect, currentQuestion);
            updateNavigationButtons();
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            const answeredQuestions = userAnswers.filter(answer => answer !== null).length;
            const progressPercentage = (answeredQuestions / quizData.length) * 100;
            progressIndicatorEl.style.width = `${progressPercentage}%`;
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            prevBtn.style.display = 'block';
            nextBtn.style.display = 'block';
            hintBtn.style.display = 'block'; // 显示提示按钮

            prevBtn.disabled = currentQuestionIndex === 0;
            nextBtn.disabled = false; // 最后一题时，下一题按钮不禁用，而是用于显示报告
            nextBtn.textContent = (currentQuestionIndex === quizData.length - 1) ? '查看报告' : '下一题';
            
            // 如果当前问题没有提示，则禁用提示按钮并隐藏提示内容
            if (!quizData[currentQuestionIndex].hint) {
                hintBtn.disabled = true;
                hintContainerEl.style.display = 'none';
                hintContainerEl.textContent = ''; // 清除旧的提示内容
            } else {
                hintBtn.disabled = false;
            }
        }

        function showResult(isCorrect, questionData) {
            resultContainerEl.innerHTML = ''; // 清空之前的结果
            const resultBox = document.createElement('div');
            resultBox.className = `result-box ${isCorrect ? 'correct' : 'incorrect'}`;
            
            let html = `<h3>${isCorrect ? '回答正确！' : '回答错误'}</h3>`;
            if (!isCorrect) {
                html += `<p><strong>正确答案是：</strong> ${questionData.options[questionData.correctAnswerIndex]}</p>`;
            }
            html += `<div class="explanation-text">${questionData.explanation}</div>`;
            html += `<div class="source-text">来源: ${questionData.source}</div>`;
            
            resultBox.innerHTML = html;
            resultContainerEl.appendChild(resultBox);

            // 禁用所有选项的点击事件，并高亮正确/错误答案
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                child.style.pointerEvents = 'none';
                // 高亮正确答案
                if (index === questionData.correctAnswerIndex) {
                    child.classList.add('correct'); // 需要添加CSS样式
                    child.style.backgroundColor = '#d4edda';
                    child.style.borderColor = '#c3e6cb';
                }
                // 如果选错了，高亮错误选项
                if (!isCorrect && index === userAnswers[currentQuestionIndex]) {
                    child.classList.add('incorrect'); // 需要添加CSS样式
                    child.style.backgroundColor = '#f8d7da';
                    child.style.borderColor = '#f5c6cb';
                }
            });
        }

        function goToNextQuestion() {
            if (currentQuestionIndex < quizData.length - 1) {
                currentQuestionIndex++;
                loadQuestion();
            } else {
                showFinalScore();
            }
        }

        function goToPreviousQuestion() {
            if (currentQuestionIndex > 0) {
                currentQuestionIndex--;
                loadQuestion();
            }
        }
        
        function showHint() {
            const currentQuestion = quizData[currentQuestionIndex];
            if (currentQuestion.hint) {
                hintContainerEl.textContent = currentQuestion.hint;
                hintContainerEl.style.display = 'block';
            } else {
                hintContainerEl.style.display = 'none';
            }
        }

        function showFinalScore() {
            document.querySelector('.quiz-body').style.display = 'none';
            document.getElementById('quiz-footer').style.display = 'none';

            const correctCount = score;
            const totalQuestions = quizData.length;
            const answeredCount = userAnswers.filter(a => a !== null).length;
            const wrongCount = answeredCount - correctCount;
            const skippedCount = totalQuestions - answeredCount;
            const accuracy = totalQuestions > 0 ? Math.round((correctCount / totalQuestions) * 100) : 0;
            const errorRate = totalQuestions > 0 ? Math.round((wrongCount / totalQuestions) * 100) : 0;

            const finalScoreHtml =
                '<div class="final-score-container">' +
                '<h2>答题报告</h2>' +
                '<div class="score-summary">' +
                '<div class="score-card">' +
                '<h3>得分</h3>' +
                '<p>' + correctCount + ' / ' + totalQuestions + '</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>正确率</h3>' +
                '<p>' + accuracy + '%</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>错误率</h3>' +
                '<p>' + errorRate + '%</p>' +
                '</div>' +
                '<div class="score-card score-details">' +
                '<table>' +
                '<tr><td>正确</td><td>' + correctCount + '</td></tr>' +
                '<tr><td>错误</td><td>' + wrongCount + '</td></tr>' +
                '<tr><td>未答</td><td>' + skippedCount + '</td></tr>' +
                '</table>' +
                '</div>' +
                '</div>' +
                '<div class="report-actions">' +
                '<button id="review-btn">回顾测验</button>' +
                '<button class="primary" onclick="location.reload()">再试一次</button>' +
                '</div>' +
                '</div>';

            let reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }
            quizContentEl.insertAdjacentHTML('beforeend', finalScoreHtml);
            document.getElementById('review-btn').addEventListener('click', reviewQuiz);
        }

        function reviewQuiz() {
            const reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }

            document.querySelector('.quiz-body').style.display = 'block';
            document.getElementById('quiz-footer').style.display = 'flex';
            
            currentQuestionIndex = 0;
            loadQuestion();
            updateNavigationButtons(); // Ensure nav buttons are correctly displayed
        }

        // Event Delegation for options
        optionsListEl.addEventListener('click', (event) => {
            if (event.target && event.target.matches('li.option-item')) {
                // Check if the question has already been answered
                if (userAnswers[currentQuestionIndex] === null) {
                    const selectedIndex = parseInt(event.target.dataset.index, 10);
                    selectOption(selectedIndex);
                }
            }
        });

        prevBtn.addEventListener('click', goToPreviousQuestion);
        nextBtn.addEventListener('click', goToNextQuestion);
        hintBtn.addEventListener('click', showHint);
        
        // 初始加载
        loadQuestion();
      </script>
    </body>
    </html>
  